SD card
Type of memory storage for portable devices / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Secure Digital HC?
Summarize this article for a 10 year old
Secure Digital, officially abbreviated as SD, is a proprietary, non-volatile, flash memory card format the SD Association (SDA) developed for use in portable devices.
Media type | Memory card |
---|---|
Capacity |
|
Block size | Variable |
Read mechanism |
|
Write mechanism | Variable |
Standard | SD Standard |
Developed by | SD Association |
Dimensions |
|
Weight |
|
Usage | Portable devices, such as digital cameras and mobile phones (including most smartphones) |
Extended from | MultiMediaCard |
Released | August 1999 |
The standard was introduced in August 1999 by SanDisk, Panasonic (Matsushita) and Toshiba as an improvement on MultiMediaCards (MMCs).[1] SDs have become an industry standard. The three companies formed SD-3C, LLC, a company that licenses and enforces intellectual property (IP) rights associated with SD memory cards and SD host-and-ancillary products.[2]
In January 2000, the companies formed the SD Association (SDA), a non-profit organization to create and promote SD Card standards.[3] As of 2023[update], the SDA has approximately 1,000 member companies. It uses several SD-3C-owned trademarked logos to enforce compliance with its specifications and denote compatibility.[4]